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<a href="x__thread__task__loop_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/* Flow</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment"> * Copyright 2023 Akamai Technologies, Inc.</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment"> *</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment"> * Licensed under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"> * &quot;License&quot;); you may not use this file except in</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"> * compliance with the License.  You may obtain a copy</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment"> * of the License at</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"> *</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"> *   https://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment"> *</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"> * Unless required by applicable law or agreed to in</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment"> * writing, software distributed under the License is</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment"> * distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment"> * CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment"> * See the License for the specific language governing</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"> * permissions and limitations under the License. */</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment"></span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">/// @file</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment"></span><span class="preprocessor">#include &quot;<a class="code" href="x__thread__task__loop_8hpp.html">flow/async/x_thread_task_loop.hpp</a>&quot;</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="preprocessor">#include &quot;<a class="code" href="task__qing__thread_8hpp.html">flow/async/detail/task_qing_thread.hpp</a>&quot;</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="preprocessor">#include &quot;<a class="code" href="async_2util_8hpp.html">flow/async/util.hpp</a>&quot;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="preprocessor">#include &quot;<a class="code" href="sched__task_8hpp.html">flow/util/sched_task.hpp</a>&quot;</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span> </div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceflow_1_1async.html">flow::async</a></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span>{</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="comment">// Implementations.</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span> </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a754593f190b2ef6fd0fa6b05ed14e891">   29</a></span><a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a754593f190b2ef6fd0fa6b05ed14e891">Cross_thread_task_loop::Cross_thread_task_loop</a>(<a class="code hl_class" href="classflow_1_1log_1_1Logger.html">log::Logger</a>* logger_ptr, <a class="code hl_typedef" href="namespaceflow_1_1util.html#ae4dc52186797094b3040379ff19124c9">util::String_view</a> nickname,</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>                                               <span class="keywordtype">size_t</span> n_threads_or_zero,</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span>                                               <span class="keywordtype">bool</span> est_hw_core_sharing_helps_algo,</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>                                               <span class="keywordtype">bool</span> est_hw_core_pinning_helps_algo,</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span>                                               <span class="keywordtype">bool</span> hw_threads_is_grouping_collated) :</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span>  log::Log_context(logger_ptr, <a class="code hl_enumeration" href="namespaceflow.html#a3938730ab4b89daf13d027a5f620e7ce">Flow_log_component</a>::<a class="code hl_enumvalue" href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485a4d7a5700444c0570af37b1f9bcc6eb1f">S_ASYNC</a>),</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span> </div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span>  m_nickname(nickname),</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span>  m_n_threads_or_zero(n_threads_or_zero),</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span>  m_est_hw_core_sharing_helps_algo(est_hw_core_sharing_helps_algo),</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>  m_est_hw_core_pinning_helps_algo(est_hw_core_pinning_helps_algo),</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span>  m_hw_threads_is_grouping_collated(hw_threads_is_grouping_collated),</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span> </div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span>  <span class="comment">/* Note to reader: If you grok the doc headers of superclass and Cross_thread_task_loop, the following</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span><span class="comment">   * is easy to understand.  If you don&#39;t, then to make it clear I&#39;d have to repeat all of that here, basically.</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><span class="comment">   * So please grok it first. */</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>  m_qing_threads((m_n_threads_or_zero == 0) <span class="comment">// n_threads() nulls: still need to set each one after this.</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>                   ? <a class="code hl_function" href="namespaceflow_1_1async.html#adab04f47b40b92fffbe12bc33fadd223">optimal_worker_thread_count_per_pool</a>(logger_ptr, m_est_hw_core_sharing_helps_algo)</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span>                   : m_n_threads_or_zero),</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span>  <span class="comment">/* n_threads() is now accurate.  Create the shared Task_engine capable of smartly scheduling across N threads.</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span><span class="comment">   * Attn: Give concurrency hint; 1 in particular may help avoid or eliminate locking inside boost.asio. */</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span>  m_shared_task_engine(new util::<a class="code hl_typedef" href="namespaceflow_1_1util.html#ac3e89a8a271b0ddc76ac2a0ce488dea4">Task_engine</a>(n_threads())),</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span>  <span class="comment">// Forever initialize our Ops_list of pre-created Ops which in our case simply store long-lived Strands.</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span>  m_per_thread_strands(logger_ptr, n_threads(),</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>                       [this](size_t) -&gt; <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a></div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>                         { <span class="keywordflow">return</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a>(<a class="code hl_typedef" href="namespaceflow_1_1async.html#a2b92feccafa90bce16db57131c0fcd9e">Strand_ptr</a>(<span class="keyword">new</span> <a class="code hl_typedef" href="namespaceflow_1_1util.html#aa59354ab408e978c8a7bda1a4706924e">util::Strand</a>(*<a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>))); })</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>{</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span>  <span class="comment">/* Task_engine starts in !stopped() mode ready to run().  start() pre-condition is stopped() so for simplicity</span></div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span><span class="comment">   * start in the same state that our stop() would put the Task_engine into: */</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>  m_shared_task_engine-&gt;stop();</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>  <span class="comment">// Now our start() can always do the sequence: restart() (to make it !stopped()), then run().</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span> </div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span>  <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Cross_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">static_cast&lt;</span><span class="keyword">const </span><span class="keywordtype">void</span>*<span class="keyword">&gt;</span>(<span class="keyword">this</span>) &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>                <span class="stringliteral">&quot;with nickname [&quot;</span> &lt;&lt; m_nickname &lt;&lt; <span class="stringliteral">&quot;] &quot;</span></div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>                <span class="stringliteral">&quot;with cross-thread scheduling via single Task_engine across [&quot;</span> &lt;&lt; n_threads() &lt;&lt; <span class="stringliteral">&quot;] threads-to-be: &quot;</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span>                <span class="stringliteral">&quot;Created; can accept work.  Task_qing_thread(s) not started yet until start().&quot;</span>);</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span> </div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>  <span class="comment">/* *m_shared_task_engine can now be post()ed onto and otherwise used with boost.asio; won&#39;t do anything until we</span></div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span><span class="comment">   * start threads and run() it.  start() does that.  We&#39;re done. */</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>}</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span> </div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a1bdaa64396435066a41857e3c5f6c6cb">   71</a></span><a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a1bdaa64396435066a41857e3c5f6c6cb">Cross_thread_task_loop::~Cross_thread_task_loop</a>() <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>{</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>  <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Cross_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Destroying object; will stop threads/tasks unless already &quot;</span></div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>                <span class="stringliteral">&quot;stopped earlier.&quot;</span>);</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>  <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#aa0f53f269524b701b23237766f79df2d">stop</a>();</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span> </div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>  <span class="comment">/* m_qing_threads.clear() equivalent and m_shared_task_engine-&gt;~Task_engine() will now happen automatically.</span></div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span><span class="comment">   * Both are mere cleanup of stuff in memory. */</span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>}</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span> </div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5705e34163dec8463a30361bdb2fa83f">   81</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5705e34163dec8463a30361bdb2fa83f">Cross_thread_task_loop::start</a>(<a class="code hl_class" href="classflow_1_1Function.html">Task</a>&amp;&amp; init_task_or_empty,</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>                                   <span class="keyword">const</span> <a class="code hl_class" href="classflow_1_1Function.html">Thread_init_func</a>&amp; thread_init_func_or_empty) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>{</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceflow_1_1util.html#af030c3119f060a9630afca31098a78a5">util::Thread</a>;</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span>  <span class="keyword">using </span>boost::promise;</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>  <span class="keyword">using </span>boost::unique_future;</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>  <span class="keyword">using </span>boost::movelib::unique_ptr;</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>  <span class="keyword">using </span>std::transform;</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span>  <span class="keyword">using </span>std::vector;</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span> </div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>  <span class="comment">/* Is the check thread-safe?  Yes, since Concurrent_task_loop::stop() must not be called concurrently with itself or</span></div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span><span class="comment">   * start() per our contract in doc header. */</span></div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span>  <span class="keywordflow">if</span> (!<a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>-&gt;stopped())</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>  {</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>    <span class="comment">/* Unlike stop() after stop(), start() after start() doesn&#39;t seem all that benign (whereas double stop() will often</span></div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span><span class="comment">     * happen from dtor, say).  So use WARNING, not INFO. */</span></div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span>    <a class="code hl_define" href="log_8hpp.html#a626c7dc4d3b4dc0b32a8aac8624d66bc">FLOW_LOG_WARNING</a>(<span class="stringliteral">&quot;Starting Cross_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Already started earlier.  Ignoring.&quot;</span>);</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>  }</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span> </div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>  <span class="keyword">const</span> <span class="keywordtype">size_t</span> n = <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5c9a3da291fa961bb4d8c4be13c39bb8">n_threads</a>();</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>  <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Cross_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;] with nickname [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a91d90d8816538bbb529e9f6da7209103">m_nickname</a> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span>                <span class="stringliteral">&quot;Single Task_engine across [&quot;</span> &lt;&lt; n &lt;&lt; <span class="stringliteral">&quot;] Task_qing_threads: Starting.&quot;</span>);</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span> </div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span>  <span class="comment">// boost.asio subtlety: While stopped(), run() will instantly return, unless one does this first.</span></div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span>  <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>-&gt;restart();</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span>  <span class="comment">// Now each Task_qing_thread can do -&gt;run() as most of its thread body (and it won&#39;t just return).</span></div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span> </div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>  <span class="comment">/* Create/start the threads.</span></div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span><span class="comment">   * Subtlety: If thread_init_func_or_empty is null, then we know Task_qing_thread ctor to put very quick-executing</span></div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span><span class="comment">   * stuff onto the new thread, before it&#39;s officially ready to participate in post()ing.  So it would be fine</span></div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span><span class="comment">   * to just wait for each ctor to finish in series (in fact that&#39;s what we used to do).  Otherwise, though,</span></div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span><span class="comment">   * thread_init_func_or_empty() could be something lengthy... it&#39;s best to let the ctors launch the thread-init</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span><span class="comment">   * steps to happen asynchronously, each ctor returning potentially before its thread&#39;s init steps are finished.</span></div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span><span class="comment">   * So that&#39;s why we use the Task_qing_thread ctor mode wherein we pass in our own `promise`s and then wait afterwards</span></div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span><span class="comment">   * for them all to be satisfied, barrier-style. */</span></div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span> </div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>  vector&lt;promise&lt;void&gt;&gt; thread_init_done_promises(n);</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> idx = 0; idx != n; ++idx)</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>  {</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>    <a class="code hl_class" href="classflow_1_1Function.html">Task</a> task_qing_thread_init_func;</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>    <span class="keywordflow">if</span> (!thread_init_func_or_empty.empty())</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>    {</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>      task_qing_thread_init_func = [idx, &amp;thread_init_func_or_empty]()</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span>      {</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span>        thread_init_func_or_empty(idx);</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span>      };</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span>    }</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>    <span class="keywordflow">else</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span>    {</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>      assert(task_qing_thread_init_func.empty()); <span class="comment">// Just leave it.</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>    }</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span> </div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>    <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a2e93cd0649bf68bdeda1cb844f53c5a8">m_qing_threads</a>[idx].reset(<span class="keyword">new</span> <a class="code hl_class" href="classflow_1_1async_1_1Task__qing__thread.html">Task_qing_thread</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(),</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span>                                                   (n == 1) ? <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a91d90d8816538bbb529e9f6da7209103">m_nickname</a> : <a class="code hl_function" href="namespaceflow_1_1util.html#a685b86585da2fa5186f51854e7ae1561">util::ostream_op_string</a>(<a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a91d90d8816538bbb529e9f6da7209103">m_nickname</a>, idx),</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>                                                   <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>, <span class="keyword">false</span>, <span class="comment">// A *shared* Task_engine.</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>                                                   &amp;(thread_init_done_promises[idx]),</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span>                                                   std::move(task_qing_thread_init_func)));</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span>  } <span class="comment">// for (idx in [0, n))</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span> </div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>  <span class="comment">// By barrier-style I mean that they all the waits must be done, before the loop exits.</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>  <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;All threads are asynchronously starting.  Awaiting their readiness barrier-style, in sequence.&quot;</span>);</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> idx = 0; idx != n; ++idx)</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span>  {</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>    thread_init_done_promises[idx].get_future().wait();</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>    <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Thread [&quot;</span> &lt;&lt; idx &lt;&lt; <span class="stringliteral">&quot;] (0-based) of [&quot;</span> &lt;&lt; n &lt;&lt; <span class="stringliteral">&quot;] (1-based) is ready.&quot;</span>);</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>  }</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span> </div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>  <span class="comment">/* Threads are running and ready for work.  Note that if `m_n_threads_or_zero == 0`, then that enabled the</span></div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span><span class="comment">   * auto-config of the thread arch based on the assumption of a processor/RAM-heavy thread pool that doesn&#39;t</span></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span><span class="comment">   * benefit from hyper-threading.  This has already then had an effect by auto-determining `n`.</span></div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span><span class="comment">   * Now we complete the functionality in this auto-config mode by performing whatever thread-core pinning is</span></div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span><span class="comment">   * implied by the 3 constructor bool arguments, the use of which was enabled by `m_n_threads_or_zero == 0`.</span></div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span><span class="comment">   *</span></div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span><span class="comment">   * There is a sliiightly annoying corner case, which is that: not only are the threads *ready* for work, but</span></div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span><span class="comment">   * they might already be executing work right now, namely if stuff has been post()ed (or other types of work</span></div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span><span class="comment">   * posting) onto *m_shared_task_engine already.  Yet we haven&#39;t yet done the pinning stuff!  That&#39;s fine</span></div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span><span class="comment">   * though.  They&#39;ve only been running for, like, microseconds; and it is certainly allowed to mess with their</span></div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span><span class="comment">   * core affinities, even when they aren&#39;t idle.  @todo It&#39;s technically possible to get rid of this minor</span></div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span><span class="comment">   * sort-of-dirtiness... have Task_qing_thread wait for some signal (probably a promise/future) to actually</span></div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span><span class="comment">   * kick off Task_engine::run()... that complexity does not seem in any way worth it at this time.  Revisit maybe. */</span></div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span>  <span class="keywordflow">if</span> (<a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#ab1f8b7e68ffc431d74f1d1460597b05d">m_n_threads_or_zero</a> == 0)</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span>  {</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span>    <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Thread count was auto-determined.  Further attempting thread-to-core scheduling optimization.&quot;</span>);</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span> </div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>    vector&lt;Thread*&gt; worker_threads(n); <span class="comment">// Initialized to nulls.  Now set them to the raw `Thread*`s.</span></div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span>    transform(<a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a2e93cd0649bf68bdeda1cb844f53c5a8">m_qing_threads</a>.begin(), <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a2e93cd0649bf68bdeda1cb844f53c5a8">m_qing_threads</a>.end(), worker_threads.begin(),</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span>              [](<span class="keyword">const</span> <a class="code hl_typedef" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5ce63e80790295a9a58576b2c08559fd">Task_qing_thread_ptr</a>&amp; qing_thread_ptr) -&gt; <a class="code hl_typedef" href="namespaceflow_1_1util.html#af030c3119f060a9630afca31098a78a5">Thread</a>*</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span>                { return qing_thread_ptr-&gt;raw_worker_thread(); });</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span> </div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span>    <a class="code hl_function" href="namespaceflow_1_1async.html#a3e200db7e5375de21d2568004a85dcad">optimize_pinning_in_thread_pool</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), worker_threads,</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span>                                    <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a9ca55c3dd4326403a5dcec09c646efea">m_est_hw_core_sharing_helps_algo</a>, <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a0e0009114aa7583e0afd2ee3a9142d9f">m_est_hw_core_pinning_helps_algo</a>,</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span>                                    <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a8ffd812e4762af730708762911a52fd0">m_hw_threads_is_grouping_collated</a>);</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span>    <span class="comment">// That logged details.</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span>  }</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span> </div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span>  <span class="comment">/* That&#39;s it; ready for work/working... but help out by running this optional init task: the key is this will wait</span></div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span><span class="comment">   * until that task completes in a spawned thread.  So we return only once that has returned.</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span><span class="comment">   * Do note that anything else queued while `*this` was stopped may well run before this guy (if any). */</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span>  <span class="keywordflow">if</span> (!init_task_or_empty.empty())</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span>  {</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span>    <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#ab785edcaa745fb859aaef4743478ea07">post</a>(std::move(init_task_or_empty), <a class="code hl_enumvalue" href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485a57525f29ac96f4edd56c951e7d7c7b25">Synchronicity::S_ASYNC_AND_AWAIT_CONCURRENT_COMPLETION</a>);</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span>  }</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span> </div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>  <span class="comment">/* Sanity check: start() isn&#39;t thread-safe against stop() and start(), as we warned in our contract.</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span><span class="comment">   * But we&#39;ve also promised that other API calls *are* thread-safe, including against</span></div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span><span class="comment">   * stop().  To mentally test that &lt;see similar comment in stop()&gt;.  TL;DR: post() and similar APIs work via</span></div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span><span class="comment">   * *m_shared_task_engine safely, even as underlying thread(s) start or stop and m_shared_task_engine-&gt;run(). */</span></div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span>} <span class="comment">// Cross_thread_task_loop::start()</span></div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span> </div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#aa0f53f269524b701b23237766f79df2d">  192</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#aa0f53f269524b701b23237766f79df2d">Cross_thread_task_loop::stop</a>() <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span>{</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span>  <span class="comment">/* This is probably unnecessary, since as of this writing all below statements are no-ops if stop() was called before.</span></div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span><span class="comment">   * We still do it because:</span></div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span><span class="comment">   *   - It&#39;s cleaner: one less code path to have to reason about in terms of safety.</span></div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span><span class="comment">   *   - Less spurious/verbose logging (note Task_qing_thread would log in both its .stop() and dtor).</span></div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span><span class="comment">   *   - It&#39;s a tiny bit faster.</span></div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span><span class="comment">   *</span></div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span><span class="comment">   * Is it thread-safe?  Yes, since Concurrent_task_loop::stop() must not be called concurrently with itself per our</span></div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span><span class="comment">   * contract in doc header. */</span></div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span>  <span class="keywordflow">if</span> (<a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>-&gt;stopped())</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>  {</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>    <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Stopping Cross_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: Already stopped earlier.  Ignoring.&quot;</span>);</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>  }</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span> </div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span>  <a class="code hl_define" href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a>(<span class="stringliteral">&quot;Cross_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;] with nickname [&quot;</span> &lt;&lt; <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a91d90d8816538bbb529e9f6da7209103">m_nickname</a> &lt;&lt; <span class="stringliteral">&quot;]: Stopping: &quot;</span></div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span>                <span class="stringliteral">&quot;All ongoing thread tasks will complete normally; all pending thread tasks will be belayed [sic]; &quot;</span></div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span>                <span class="stringliteral">&quot;each thread will be asked to gracefully terminate and be joined synchronously.  &quot;</span></div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>                <span class="stringliteral">&quot;Any subsequently-queued tasks will not run until start().&quot;</span>);</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span> </div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span>  <span class="comment">/* Kick off all the thread exits in parallel.  To see how the following statement accomplishes this,</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span><span class="comment">   * consider what happens when Task_engine::stop() does its thing.  boost.asio docs show</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span><span class="comment">   * that it lets any ongoing task(s) to complete normally/return.  (That is even the case if it, and we, are called</span></div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span><span class="comment">   * from within a task in the thread pool itself.)  They further show any *more* tasks are prevented from running</span></div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span><span class="comment">   * even if already queued up.  Lastly, Task_engine::run() will exit, in any thread that invoked it.</span></div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span><span class="comment">   *</span></div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span><span class="comment">   * In our case, each thread&#39;s body is Task_engine::run(), meaning once that returns, the thread ends gracefully.</span></div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span><span class="comment">   * So that&#39;s how the following kicks off all the thread exits. */</span></div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span>  <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>-&gt;stop();</div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span>  assert(<a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>-&gt;stopped());</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span>  <span class="comment">// Any pending tasks on *m_shared_task_engine now await another thread to -&gt;run().  Then the queue will resume.</span></div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span> </div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span>  <span class="comment">/* That has almost satisfied the contract in our doc header.  All that&#39;s left is to return only once the thread-exit</span></div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span><span class="comment">   * we&#39;ve kicked off fully completes, a/k/a we must join those threads.  Do so: */</span></div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span>  <span class="keywordflow">for</span> (<a class="code hl_typedef" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5ce63e80790295a9a58576b2c08559fd">Task_qing_thread_ptr</a>&amp; thread_ptr_in_container : <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a2e93cd0649bf68bdeda1cb844f53c5a8">m_qing_threads</a>)</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span>  {</div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span>    <span class="comment">/* By its contract, this will simply wait for the threads to exit (and it&#39;s up to us to kick that off, which we</span></div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span><span class="comment">     * did above). */</span></div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span>    thread_ptr_in_container-&gt;stop();</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span> </div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>    <span class="comment">/* Delete the Task_qing_thread.  Sanity check: Is it safe?  Yes, because in our case, nothing ever touches the</span></div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span><span class="comment">     * thread objects m_qing_threads[] themselves after start() -- all posting/etc. is done indirectly through</span></div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span><span class="comment">     * m_shared_task_engine, shared among all the threads; and that will keep working (but no-op&#39;ing until the next</span></div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span><span class="comment">     * start() if any).</span></div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span><span class="comment">     *</span></div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span><span class="comment">     * Lastly, why not m_qing_threads.clear() instead, which is equivalent to .reset() + clearing the container of</span></div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span><span class="comment">     * pointers too, thus freeing a bit more RAM?  Answer: n_threads() *does* access m_qing_threads.size() after stop();</span></div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span><span class="comment">     * plus start() would assume the vector has the elements, albeit nulls; clear() would break that.</span></div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span><span class="comment">     * The RAM savings via clear() are minor, so we haven&#39;t bothered making it more complicated. */</span></div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span>    thread_ptr_in_container.reset();</div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span>  }</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span>  <span class="comment">// All threads joined as promised.</span></div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno">  246</span> </div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span>  <span class="comment">/* Sanity check: stop() isn&#39;t thread-safe against stop() and start(), as we warned in our contract.</span></div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span><span class="comment">   * But we&#39;ve also promised that other API calls *are* thread-safe, including against</span></div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno">  249</span><span class="comment">   * stop().  Let&#39;s mentally test that by analyzing the</span></div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno">  250</span><span class="comment">   * above statements against a hypothetical concurrent boost::asio::post(m_shared_task_engine, F) (and all our</span></div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno">  251</span><span class="comment">   * task-posting APIs reduce to boost::asio::post() ultimately).</span></div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno">  252</span><span class="comment">   *   - Task_engine::stop() is thread-safe against boost::asio::post(&lt;same Task_engine&gt;, F) by boost.asio docs.</span></div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span><span class="comment">   *   - Task_qing_thread::stop() merely joins the thread (waits for Task_engine::run() to return as kicked off</span></div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span><span class="comment">   *     in previous bullet point).  No prob: It&#39;s equally fine to boost::asio::post(E, F) before and after</span></div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno">  255</span><span class="comment">   *     E.run() returns, as well as from within tasks invoked by E.run(), by boost.asio docs (and common sense).</span></div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno">  256</span><span class="comment">   *   - ~Task_qing_thread() is safe, as m_qing_threads[] is never accessed at all after start() returns (outside of</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno">  257</span><span class="comment">   *     stop()), as discussed above.</span></div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno">  258</span><span class="comment">   *</span></div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno">  259</span><span class="comment">   * Mentally testing our thread-safety against other, non-posting, APIs is left as an exercise to the reader. */</span></div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno">  260</span>} <span class="comment">// Cross_thread_task_loop::stop()</span></div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno">  261</span> </div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5c9a3da291fa961bb4d8c4be13c39bb8">  262</a></span><span class="keywordtype">size_t</span> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5c9a3da291fa961bb4d8c4be13c39bb8">Cross_thread_task_loop::n_threads</a>() const <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno">  263</span>{</div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno">  264</span>  <span class="keywordflow">return</span> <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a2e93cd0649bf68bdeda1cb844f53c5a8">m_qing_threads</a>.size();</div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno">  265</span>}</div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno">  266</span> </div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a2c713a2692fd7eb17e4c6ebc22cc8cfc">  267</a></span><a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a2c713a2692fd7eb17e4c6ebc22cc8cfc">Cross_thread_task_loop::create_op</a>() <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno">  268</span>{</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno">  269</span>  <span class="keywordflow">return</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a>(<a class="code hl_typedef" href="namespaceflow_1_1async.html#a2b92feccafa90bce16db57131c0fcd9e">Strand_ptr</a>(<span class="keyword">new</span> <a class="code hl_typedef" href="namespaceflow_1_1util.html#aa59354ab408e978c8a7bda1a4706924e">util::Strand</a>(*<a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>)));</div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno">  270</span>}</div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno">  271</span> </div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#af00698ef9a83bcc4e7e34fec89274569">  272</a></span><span class="keyword">const</span> <a class="code hl_class" href="classflow_1_1async_1_1Op__list.html">Op_list</a>&amp; <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#af00698ef9a83bcc4e7e34fec89274569">Cross_thread_task_loop::per_thread_ops</a>() <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno">  273</span>{</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno">  274</span>  <span class="keywordflow">return</span> <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#addbcc2e22d4a57b89b82130bb0f3e482">m_per_thread_strands</a>;</div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno">  275</span>}</div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno">  276</span> </div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#ab785edcaa745fb859aaef4743478ea07">  277</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#ab785edcaa745fb859aaef4743478ea07">Cross_thread_task_loop::post</a>(<a class="code hl_class" href="classflow_1_1Function.html">Task</a>&amp;&amp; task, <a class="code hl_enumeration" href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485">Synchronicity</a> synchronicity) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno">  278</span>{</div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno">  279</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceflow_1_1util.html#ac3e89a8a271b0ddc76ac2a0ce488dea4">util::Task_engine</a>;</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno">  280</span> </div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno">  281</span>  <a class="code hl_define" href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a>(<span class="stringliteral">&quot;Cross_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno">  282</span>                 <span class="stringliteral">&quot;About to post single-task sequence via boost.asio scheduler; details TRACE-logged below.&quot;</span>);</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno">  283</span> </div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno">  284</span>  <span class="comment">/* No constraint vs. any other task: simply post to some random-ish thread in our pool-spanning shared Task_engine.</span></div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno">  285</span><span class="comment">   * Any details as to when to run it and whether/how long to wait for completion are forwarded to</span></div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span><span class="comment">   * the following per contract. */</span></div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno">  287</span> </div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno">  288</span>  asio_exec_ctx_post&lt;Task_engine&gt;</div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno">  289</span>    (<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>.get(), synchronicity, std::move(task));</div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno">  290</span>} <span class="comment">// Cross_thread_task_loop::post()</span></div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno">  291</span> </div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#af64a0de5c3831cd89f8211e6abe1bba7">  292</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#ab785edcaa745fb859aaef4743478ea07">Cross_thread_task_loop::post</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a>&amp; op, <a class="code hl_class" href="classflow_1_1Function.html">Task</a>&amp;&amp; task, <a class="code hl_enumeration" href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485">Synchronicity</a> synchronicity) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno">  293</span>{</div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno">  294</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceflow_1_1util.html#aa59354ab408e978c8a7bda1a4706924e">util::Strand</a>;</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno">  295</span> </div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno">  296</span>  <span class="keywordflow">if</span> (<a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5c9a3da291fa961bb4d8c4be13c39bb8">n_threads</a>() == 1)</div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno">  297</span>  {</div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno">  298</span>    <span class="comment">// Non-concurrency is always guaranteed with 1 thread.  An optimization (though boost.asio likely does similar).</span></div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno">  299</span>    <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#ab785edcaa745fb859aaef4743478ea07">post</a>(std::move(task));</div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno">  300</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno">  301</span>  }</div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno">  302</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno">  303</span> </div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno">  304</span>  <span class="keyword">auto</span> <span class="keyword">const</span> chosen_strand_ptr = <a class="code hl_function" href="namespaceflow_1_1async.html#a5dad6aeb3cf4219833e18343bec0b423">op_to_exec_ctx&lt;Strand_ptr&gt;</a>(<span class="keyword">this</span>, op);</div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno">  305</span>  <a class="code hl_define" href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a>(<span class="stringliteral">&quot;Cross_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno">  306</span>                 <span class="stringliteral">&quot;About to post a task in multi-task sequence &quot;</span></div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno">  307</span>                 <span class="stringliteral">&quot;via previously created strand; details TRACE-logged below.&quot;</span>);</div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno">  308</span> </div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno">  309</span>  <span class="comment">/* This is much like the other post() but with the extra constraint: must not run concurrently with any other Task</span></div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno">  310</span><span class="comment">   * post()ed to the Strand pointed to by `op`&#39;s payload.  That is simply the core functionality of a Strand.</span></div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno">  311</span><span class="comment">   *</span></div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno">  312</span><span class="comment">   * Check out asio_exec_ctx_post() doc header, but TL;DR spoiler alert: It works equally well, because Strand has</span></div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno">  313</span><span class="comment">   * the same needed post() and dispatch() abilities as the Task_engine from which it is born. */</span></div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno">  314</span> </div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno">  315</span>  asio_exec_ctx_post&lt;Strand&gt;</div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno">  316</span>    (<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), chosen_strand_ptr.get(), synchronicity, std::move(task));</div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno">  317</span>} <span class="comment">// Cross_thread_task_loop::post()</span></div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno">  318</span> </div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a1008ae4c48d32ebf835d7a7ba203e5a9">  319</a></span><a class="code hl_typedef" href="namespaceflow_1_1util.html#aa0d10f5a906b3229f48979aa43e9ff7e">util::Scheduled_task_handle</a> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a1008ae4c48d32ebf835d7a7ba203e5a9">Cross_thread_task_loop::schedule_from_now</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow.html#a48799f1263cdeedec125be51a3db2b79">Fine_duration</a>&amp; from_now,</div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno">  320</span>                                                                      <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a>&amp;&amp; task) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno">  321</span>{</div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno">  322</span>  <span class="keyword">using </span><a class="code hl_function" href="namespaceflow_1_1util.html#a74d4a66fb00055be4e1bd6ee98e04667">util::schedule_task_from_now</a>;</div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno">  323</span> </div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno">  324</span>  <span class="comment">// See 1-arg post().  Keeping comments light.</span></div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno">  325</span> </div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno">  326</span>  <span class="keyword">auto</span> <span class="keyword">const</span> logger_ptr = <a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>();</div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno">  327</span>  <span class="keywordflow">if</span> (logger_ptr &amp;&amp; logger_ptr-&gt;should_log(<a class="code hl_enumvalue" href="namespaceflow_1_1log.html#a5c602384e6fe9d7642740ac2fae4ad04a3ee808b04c34bf6c110e3754de277f7b">log::Sev::S_TRACE</a>, <a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#a8a5fef42dc2cedf3c0d1a6e83beb2948">get_log_component</a>()))</div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno">  328</span>  {</div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno">  329</span>    <a class="code hl_define" href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a>(<span class="stringliteral">&quot;Cross_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno">  330</span>                                    <span class="stringliteral">&quot;About to schedule single-task sequence via boost.asio timer+scheduler.&quot;</span>);</div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno">  331</span> </div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno">  332</span>    <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a> task_plus_logs = [<span class="keyword">this</span>, task = std::move(task)]</div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno">  333</span>                                    (<span class="keywordtype">bool</span> short_fired)</div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno">  334</span>    {</div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno">  335</span>      <a class="code hl_define" href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a>(<span class="stringliteral">&quot;Scheduled task starting: &quot;</span></div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno">  336</span>                                      <span class="stringliteral">&quot;current processor logical core index [&quot;</span> &lt;&lt; <a class="code hl_function" href="namespaceflow_1_1async.html#a4cce43f39672e80cba5512103c53ae60">cpu_idx</a>() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno">  337</span>      task(short_fired);</div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno">  338</span>      <a class="code hl_define" href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a>(<span class="stringliteral">&quot;Scheduled task ended: &quot;</span></div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno">  339</span>                                      <span class="stringliteral">&quot;current processor logical core index [&quot;</span> &lt;&lt; <a class="code hl_function" href="namespaceflow_1_1async.html#a4cce43f39672e80cba5512103c53ae60">cpu_idx</a>() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno">  340</span>    };</div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno">  341</span> </div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno">  342</span>    <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceflow_1_1util.html#a74d4a66fb00055be4e1bd6ee98e04667">schedule_task_from_now</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), from_now, <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5c9a3da291fa961bb4d8c4be13c39bb8">n_threads</a>() == 1,</div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno">  343</span>                                  <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>.get(), std::move(task_plus_logs));</div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno">  344</span>  }</div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno">  345</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno">  346</span> </div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno">  347</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceflow_1_1util.html#a74d4a66fb00055be4e1bd6ee98e04667">schedule_task_from_now</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), from_now, <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5c9a3da291fa961bb4d8c4be13c39bb8">n_threads</a>() == 1,</div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno">  348</span>                                <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>.get(), std::move(task));</div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno">  349</span>}</div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno">  350</span> </div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a414e266ad227e12d47cb25f827251698">  351</a></span><a class="code hl_typedef" href="namespaceflow_1_1util.html#aa0d10f5a906b3229f48979aa43e9ff7e">util::Scheduled_task_handle</a> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a1008ae4c48d32ebf835d7a7ba203e5a9">Cross_thread_task_loop::schedule_from_now</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a>&amp; op,</div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno">  352</span>                                                                      <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow.html#a48799f1263cdeedec125be51a3db2b79">Fine_duration</a>&amp; from_now,</div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno">  353</span>                                                                      <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a>&amp;&amp; task) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno">  354</span>{</div>
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno">  355</span>  <span class="keyword">using </span><a class="code hl_typedef" href="namespaceflow_1_1util.html#aa59354ab408e978c8a7bda1a4706924e">util::Strand</a>;</div>
<div class="line"><a id="l00356" name="l00356"></a><span class="lineno">  356</span>  <span class="keyword">using </span><a class="code hl_function" href="namespaceflow_1_1util.html#a74d4a66fb00055be4e1bd6ee98e04667">util::schedule_task_from_now</a>;</div>
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno">  357</span>  <span class="keyword">using </span>boost::asio::bind_executor;</div>
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno">  358</span> </div>
<div class="line"><a id="l00359" name="l00359"></a><span class="lineno">  359</span>  <span class="comment">// See 2-arg post().  Keeping comments light.</span></div>
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno">  360</span> </div>
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno">  361</span>  <span class="keywordflow">if</span> (<a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5c9a3da291fa961bb4d8c4be13c39bb8">n_threads</a>() == 1)</div>
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno">  362</span>  {</div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno">  363</span>    <span class="keywordflow">return</span> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a1008ae4c48d32ebf835d7a7ba203e5a9">schedule_from_now</a>(from_now, std::move(task));</div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno">  364</span>  }</div>
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno">  365</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno">  366</span> </div>
<div class="line"><a id="l00367" name="l00367"></a><span class="lineno">  367</span>  assert(op.type() == <span class="keyword">typeid</span>(<a class="code hl_typedef" href="namespaceflow_1_1async.html#a2b92feccafa90bce16db57131c0fcd9e">Strand_ptr</a>));</div>
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno">  368</span>  <span class="keyword">auto</span> <span class="keyword">const</span> chosen_strand_ptr = <a class="code hl_function" href="namespaceflow_1_1async.html#a5dad6aeb3cf4219833e18343bec0b423">op_to_exec_ctx&lt;Strand_ptr&gt;</a>(<span class="keyword">this</span>, op);</div>
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno">  369</span> </div>
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno">  370</span>  <span class="keyword">auto</span> <span class="keyword">const</span> logger_ptr = <a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>();</div>
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno">  371</span>  <span class="keywordflow">if</span> (logger_ptr &amp;&amp; logger_ptr-&gt;should_log(<a class="code hl_enumvalue" href="namespaceflow_1_1log.html#a5c602384e6fe9d7642740ac2fae4ad04a3ee808b04c34bf6c110e3754de277f7b">log::Sev::S_TRACE</a>, <a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#a8a5fef42dc2cedf3c0d1a6e83beb2948">get_log_component</a>()))</div>
<div class="line"><a id="l00372" name="l00372"></a><span class="lineno">  372</span>  {</div>
<div class="line"><a id="l00373" name="l00373"></a><span class="lineno">  373</span>    <a class="code hl_define" href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a>(<span class="stringliteral">&quot;Cross_thread_task_loop [&quot;</span> &lt;&lt; <span class="keyword">this</span> &lt;&lt; <span class="stringliteral">&quot;]: &quot;</span></div>
<div class="line"><a id="l00374" name="l00374"></a><span class="lineno">  374</span>                                    <span class="stringliteral">&quot;About to schedule single-task sequence via boost.asio timer+scheduler &quot;</span></div>
<div class="line"><a id="l00375" name="l00375"></a><span class="lineno">  375</span>                                    <span class="stringliteral">&quot;via previously created strand [&quot;</span> &lt;&lt; chosen_strand_ptr &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00376" name="l00376"></a><span class="lineno">  376</span> </div>
<div class="line"><a id="l00377" name="l00377"></a><span class="lineno">  377</span>    <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a> task_plus_logs = [<span class="keyword">this</span>, task = std::move(task)]</div>
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno">  378</span>                                    (<span class="keywordtype">bool</span> short_fired)</div>
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno">  379</span>    {</div>
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno">  380</span>      <a class="code hl_define" href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a>(<span class="stringliteral">&quot;Scheduled task starting: &quot;</span></div>
<div class="line"><a id="l00381" name="l00381"></a><span class="lineno">  381</span>                                      <span class="stringliteral">&quot;current processor logical core index [&quot;</span> &lt;&lt; <a class="code hl_function" href="namespaceflow_1_1async.html#a4cce43f39672e80cba5512103c53ae60">cpu_idx</a>() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno">  382</span>      task(short_fired);</div>
<div class="line"><a id="l00383" name="l00383"></a><span class="lineno">  383</span>      <a class="code hl_define" href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a>(<span class="stringliteral">&quot;Scheduled task ended: &quot;</span></div>
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno">  384</span>                                      <span class="stringliteral">&quot;current processor logical core index [&quot;</span> &lt;&lt; <a class="code hl_function" href="namespaceflow_1_1async.html#a4cce43f39672e80cba5512103c53ae60">cpu_idx</a>() &lt;&lt; <span class="stringliteral">&quot;].&quot;</span>);</div>
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno">  385</span>    };</div>
<div class="line"><a id="l00386" name="l00386"></a><span class="lineno">  386</span> </div>
<div class="line"><a id="l00387" name="l00387"></a><span class="lineno">  387</span>    <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceflow_1_1util.html#a74d4a66fb00055be4e1bd6ee98e04667">schedule_task_from_now</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), from_now, <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5c9a3da291fa961bb4d8c4be13c39bb8">n_threads</a>() == 1, <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>.get(),</div>
<div class="line"><a id="l00388" name="l00388"></a><span class="lineno">  388</span>                                  bind_executor(*chosen_strand_ptr, task_plus_logs)); <span class="comment">// &lt;-- ATTN!  Go through Strand.</span></div>
<div class="line"><a id="l00389" name="l00389"></a><span class="lineno">  389</span>  }</div>
<div class="line"><a id="l00390" name="l00390"></a><span class="lineno">  390</span>  <span class="comment">// else</span></div>
<div class="line"><a id="l00391" name="l00391"></a><span class="lineno">  391</span> </div>
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno">  392</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceflow_1_1util.html#a74d4a66fb00055be4e1bd6ee98e04667">schedule_task_from_now</a>(<a class="code hl_function" href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">get_logger</a>(), from_now, <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5c9a3da291fa961bb4d8c4be13c39bb8">n_threads</a>() == 1, <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>.get(),</div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno">  393</span>                                bind_executor(*chosen_strand_ptr, task)); <span class="comment">// &lt;-- ATTN!  Go through Strand.</span></div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno">  394</span>}</div>
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno">  395</span> </div>
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#aa8fb0ac1ac3dc4fb86b0a7dbec0a8686">  396</a></span><a class="code hl_typedef" href="namespaceflow_1_1util.html#aa0d10f5a906b3229f48979aa43e9ff7e">util::Scheduled_task_handle</a> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#aa8fb0ac1ac3dc4fb86b0a7dbec0a8686">Cross_thread_task_loop::schedule_at</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow.html#a9d9cc2eeb10d398cff5591d446b763b8">Fine_time_pt</a>&amp; at,</div>
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno">  397</span>                                                                <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a>&amp;&amp; task) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno">  398</span>{</div>
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno">  399</span>  <span class="comment">/* This is straightforward, clearly, but note that -- moreover -- there is no perf downside to doing this</span></div>
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno">  400</span><span class="comment">   * instead of copy-pasting schedule_from_now()&#39;s body while using util::schedule_task_at() directly.  That&#39;s</span></div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno">  401</span><span class="comment">   * according to the `### Performance ###` note in schedule_task_at()&#39;s doc header.  So there&#39;s no perf penalty for</span></div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno">  402</span><span class="comment">   * keeping this code trivial. */</span></div>
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno">  403</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a1008ae4c48d32ebf835d7a7ba203e5a9">schedule_from_now</a>(at - Fine_clock::now(), std::move(task));</div>
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno">  404</span>}</div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno">  405</span> </div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3405f13bd63f6a9156cc6efb5c9f44be">  406</a></span><a class="code hl_typedef" href="namespaceflow_1_1util.html#aa0d10f5a906b3229f48979aa43e9ff7e">util::Scheduled_task_handle</a> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#aa8fb0ac1ac3dc4fb86b0a7dbec0a8686">Cross_thread_task_loop::schedule_at</a>(<span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a>&amp; op,</div>
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno">  407</span>                                                                <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow.html#a9d9cc2eeb10d398cff5591d446b763b8">Fine_time_pt</a>&amp; at,</div>
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno">  408</span>                                                                <a class="code hl_class" href="classflow_1_1Function.html">Scheduled_task</a>&amp;&amp; task) <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno">  409</span>{</div>
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno">  410</span>  <span class="comment">// Same comment as in other schedule_at().</span></div>
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno">  411</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a1008ae4c48d32ebf835d7a7ba203e5a9">schedule_from_now</a>(op, at - Fine_clock::now(), std::move(task));</div>
<div class="line"><a id="l00412" name="l00412"></a><span class="lineno">  412</span>}</div>
<div class="line"><a id="l00413" name="l00413"></a><span class="lineno">  413</span> </div>
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno"><a class="line" href="classflow_1_1async_1_1Cross__thread__task__loop.html#ac46c461e0e5f4cf22305eb640ac2bbb0">  414</a></span><a class="code hl_typedef" href="namespaceflow_1_1async.html#a968806f54b14c697fd76b3339a2bdbbf">Task_engine_ptr</a> <a class="code hl_function" href="classflow_1_1async_1_1Cross__thread__task__loop.html#ac46c461e0e5f4cf22305eb640ac2bbb0">Cross_thread_task_loop::task_engine</a>() <span class="comment">// Virtual.</span></div>
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno">  415</span>{</div>
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno">  416</span>  <span class="keywordflow">return</span> <a class="code hl_variable" href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">m_shared_task_engine</a>;</div>
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno">  417</span>}</div>
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno">  418</span> </div>
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno">  419</span><span class="keyword">template</span>&lt;&gt;</div>
<div class="line"><a id="l00420" name="l00420"></a><span class="lineno"><a class="line" href="namespaceflow_1_1async.html#a5dad6aeb3cf4219833e18343bec0b423">  420</a></span><a class="code hl_typedef" href="namespaceflow_1_1async.html#a2b92feccafa90bce16db57131c0fcd9e">Strand_ptr</a> <a class="code hl_function" href="namespaceflow_1_1async.html#a5dad6aeb3cf4219833e18343bec0b423">op_to_exec_ctx&lt;Strand_ptr&gt;</a>([[maybe_unused]] <a class="code hl_class" href="classflow_1_1async_1_1Concurrent__task__loop.html">Concurrent_task_loop</a>* loop, <span class="keyword">const</span> <a class="code hl_typedef" href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">Op</a>&amp; op)</div>
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno">  421</span>{</div>
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno">  422</span>  <span class="keyword">using </span>boost::any_cast;</div>
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno">  423</span> </div>
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno">  424</span>  assert(op.type() == <span class="keyword">typeid</span>(<a class="code hl_typedef" href="namespaceflow_1_1async.html#a2b92feccafa90bce16db57131c0fcd9e">Strand_ptr</a>));</div>
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno">  425</span>  <span class="keyword">auto</span> <span class="keyword">const</span> strand_ptr = any_cast&lt;Strand_ptr&gt;(op);</div>
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno">  426</span>  assert(&amp;(strand_ptr-&gt;context()) == loop-&gt;task_engine().get());</div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno">  427</span> </div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno">  428</span>  <span class="keywordflow">return</span> strand_ptr;</div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno">  429</span>}</div>
<div class="line"><a id="l00430" name="l00430"></a><span class="lineno">  430</span> </div>
<div class="line"><a id="l00431" name="l00431"></a><span class="lineno">  431</span>} <span class="comment">// namespace flow::async</span></div>
<div class="ttc" id="aasync_2util_8hpp_html"><div class="ttname"><a href="async_2util_8hpp.html">util.hpp</a></div></div>
<div class="ttc" id="aclassflow_1_1Function_html"><div class="ttname"><a href="classflow_1_1Function.html">flow::Function</a></div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00512">common.hpp:512</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Concurrent__task__loop_html"><div class="ttname"><a href="classflow_1_1async_1_1Concurrent__task__loop.html">flow::async::Concurrent_task_loop</a></div><div class="ttdoc">The core flow::async interface, providing an optionally multi-threaded thread pool onto which runnabl...</div><div class="ttdef"><b>Definition:</b> <a href="concurrent__task__loop_8hpp_source.html#l00322">concurrent_task_loop.hpp:324</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a0e0009114aa7583e0afd2ee3a9142d9f"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a0e0009114aa7583e0afd2ee3a9142d9f">flow::async::Cross_thread_task_loop::m_est_hw_core_pinning_helps_algo</a></div><div class="ttdeci">const bool m_est_hw_core_pinning_helps_algo</div><div class="ttdoc">See constructor.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8hpp_source.html#l00293">x_thread_task_loop.hpp:293</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a1008ae4c48d32ebf835d7a7ba203e5a9"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a1008ae4c48d32ebf835d7a7ba203e5a9">flow::async::Cross_thread_task_loop::schedule_from_now</a></div><div class="ttdeci">util::Scheduled_task_handle schedule_from_now(const Fine_duration &amp;from_now, Scheduled_task &amp;&amp;task) override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00319">x_thread_task_loop.cpp:319</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a1bdaa64396435066a41857e3c5f6c6cb"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a1bdaa64396435066a41857e3c5f6c6cb">flow::async::Cross_thread_task_loop::~Cross_thread_task_loop</a></div><div class="ttdeci">~Cross_thread_task_loop() override</div><div class="ttdoc">See superclass destructor.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00071">x_thread_task_loop.cpp:71</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a2c713a2692fd7eb17e4c6ebc22cc8cfc"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a2c713a2692fd7eb17e4c6ebc22cc8cfc">flow::async::Cross_thread_task_loop::create_op</a></div><div class="ttdeci">Op create_op() override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00267">x_thread_task_loop.cpp:267</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a2e93cd0649bf68bdeda1cb844f53c5a8"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a2e93cd0649bf68bdeda1cb844f53c5a8">flow::async::Cross_thread_task_loop::m_qing_threads</a></div><div class="ttdeci">std::vector&lt; Task_qing_thread_ptr &gt; m_qing_threads</div><div class="ttdoc">N task-execution-capable worker threads whose lifetimes equal those of *this, all sharing m_shared_ta...</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8hpp_source.html#l00298">x_thread_task_loop.hpp:298</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a3fb892d50647ad249eea983b7a664315"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a3fb892d50647ad249eea983b7a664315">flow::async::Cross_thread_task_loop::m_shared_task_engine</a></div><div class="ttdeci">Task_engine_ptr m_shared_task_engine</div><div class="ttdoc">boost.asio Task_engine (a/k/a io_context) co-used by all m_qing_threads.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8hpp_source.html#l00301">x_thread_task_loop.hpp:301</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a5705e34163dec8463a30361bdb2fa83f"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5705e34163dec8463a30361bdb2fa83f">flow::async::Cross_thread_task_loop::start</a></div><div class="ttdeci">void start(Task &amp;&amp;init_task_or_empty=Task(), const Thread_init_func &amp;thread_init_func_or_empty=Thread_init_func()) override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00081">x_thread_task_loop.cpp:81</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a5c9a3da291fa961bb4d8c4be13c39bb8"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5c9a3da291fa961bb4d8c4be13c39bb8">flow::async::Cross_thread_task_loop::n_threads</a></div><div class="ttdeci">size_t n_threads() const override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00262">x_thread_task_loop.cpp:262</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a5ce63e80790295a9a58576b2c08559fd"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a5ce63e80790295a9a58576b2c08559fd">flow::async::Cross_thread_task_loop::Task_qing_thread_ptr</a></div><div class="ttdeci">boost::movelib::unique_ptr&lt; Task_qing_thread &gt; Task_qing_thread_ptr</div><div class="ttdoc">Short-hand for smart pointer to Task_qing_thread.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8hpp_source.html#l00282">x_thread_task_loop.hpp:282</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a754593f190b2ef6fd0fa6b05ed14e891"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a754593f190b2ef6fd0fa6b05ed14e891">flow::async::Cross_thread_task_loop::Cross_thread_task_loop</a></div><div class="ttdeci">Cross_thread_task_loop(log::Logger *logger_ptr, util::String_view nickname, size_t n_threads_or_zero, bool est_hw_core_sharing_helps_algo=false, bool est_hw_core_pinning_helps_algo=false, bool hw_threads_is_grouping_collated=false)</div><div class="ttdoc">Constructs object, making it available for post() and similar work, but without starting any threads ...</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00029">x_thread_task_loop.cpp:29</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a8ffd812e4762af730708762911a52fd0"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a8ffd812e4762af730708762911a52fd0">flow::async::Cross_thread_task_loop::m_hw_threads_is_grouping_collated</a></div><div class="ttdeci">const bool m_hw_threads_is_grouping_collated</div><div class="ttdoc">See constructor.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8hpp_source.html#l00295">x_thread_task_loop.hpp:295</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a91d90d8816538bbb529e9f6da7209103"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a91d90d8816538bbb529e9f6da7209103">flow::async::Cross_thread_task_loop::m_nickname</a></div><div class="ttdeci">const std::string m_nickname</div><div class="ttdoc">See constructor.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8hpp_source.html#l00287">x_thread_task_loop.hpp:287</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_a9ca55c3dd4326403a5dcec09c646efea"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#a9ca55c3dd4326403a5dcec09c646efea">flow::async::Cross_thread_task_loop::m_est_hw_core_sharing_helps_algo</a></div><div class="ttdeci">const bool m_est_hw_core_sharing_helps_algo</div><div class="ttdoc">See constructor.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8hpp_source.html#l00291">x_thread_task_loop.hpp:291</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_aa0f53f269524b701b23237766f79df2d"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#aa0f53f269524b701b23237766f79df2d">flow::async::Cross_thread_task_loop::stop</a></div><div class="ttdeci">void stop() override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00192">x_thread_task_loop.cpp:192</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_aa8fb0ac1ac3dc4fb86b0a7dbec0a8686"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#aa8fb0ac1ac3dc4fb86b0a7dbec0a8686">flow::async::Cross_thread_task_loop::schedule_at</a></div><div class="ttdeci">util::Scheduled_task_handle schedule_at(const Fine_time_pt &amp;at, Scheduled_task &amp;&amp;task) override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00396">x_thread_task_loop.cpp:396</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_ab1f8b7e68ffc431d74f1d1460597b05d"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#ab1f8b7e68ffc431d74f1d1460597b05d">flow::async::Cross_thread_task_loop::m_n_threads_or_zero</a></div><div class="ttdeci">const size_t m_n_threads_or_zero</div><div class="ttdoc">See constructor.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8hpp_source.html#l00289">x_thread_task_loop.hpp:289</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_ab785edcaa745fb859aaef4743478ea07"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#ab785edcaa745fb859aaef4743478ea07">flow::async::Cross_thread_task_loop::post</a></div><div class="ttdeci">void post(Task &amp;&amp;task, Synchronicity synchronicity=Synchronicity::S_ASYNC) override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00277">x_thread_task_loop.cpp:277</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_ac46c461e0e5f4cf22305eb640ac2bbb0"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#ac46c461e0e5f4cf22305eb640ac2bbb0">flow::async::Cross_thread_task_loop::task_engine</a></div><div class="ttdeci">Task_engine_ptr task_engine() override</div><div class="ttdoc">See superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00414">x_thread_task_loop.cpp:414</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_addbcc2e22d4a57b89b82130bb0f3e482"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#addbcc2e22d4a57b89b82130bb0f3e482">flow::async::Cross_thread_task_loop::m_per_thread_strands</a></div><div class="ttdeci">const Op_list m_per_thread_strands</div><div class="ttdoc">See per_thread_ops(). The boost::any payload is always of the type async::Strand_ptr.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8hpp_source.html#l00304">x_thread_task_loop.hpp:304</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Cross__thread__task__loop_html_af00698ef9a83bcc4e7e34fec89274569"><div class="ttname"><a href="classflow_1_1async_1_1Cross__thread__task__loop.html#af00698ef9a83bcc4e7e34fec89274569">flow::async::Cross_thread_task_loop::per_thread_ops</a></div><div class="ttdeci">const Op_list &amp; per_thread_ops() override</div><div class="ttdoc">Implements superclass API.</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00272">x_thread_task_loop.cpp:272</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Op__list_html"><div class="ttname"><a href="classflow_1_1async_1_1Op__list.html">flow::async::Op_list</a></div><div class="ttdoc">Simple, immutable vector-like sequence of N opaque async::Op objects, usually corresponding to N work...</div><div class="ttdef"><b>Definition:</b> <a href="op_8hpp_source.html#l00056">op.hpp:58</a></div></div>
<div class="ttc" id="aclassflow_1_1async_1_1Task__qing__thread_html"><div class="ttname"><a href="classflow_1_1async_1_1Task__qing__thread.html">flow::async::Task_qing_thread</a></div><div class="ttdoc">Internally used building block of various concrete Concurrent_task_loop subclasses that encapsulates ...</div><div class="ttdef"><b>Definition:</b> <a href="task__qing__thread_8hpp_source.html#l00059">task_qing_thread.hpp:62</a></div></div>
<div class="ttc" id="aclassflow_1_1log_1_1Log__context_html_a8a5fef42dc2cedf3c0d1a6e83beb2948"><div class="ttname"><a href="classflow_1_1log_1_1Log__context.html#a8a5fef42dc2cedf3c0d1a6e83beb2948">flow::log::Log_context::get_log_component</a></div><div class="ttdeci">const Component &amp; get_log_component() const</div><div class="ttdoc">Returns reference to the stored Component object, particularly as many FLOW_LOG_*() macros expect.</div><div class="ttdef"><b>Definition:</b> <a href="log_8cpp_source.html#l00222">log.cpp:222</a></div></div>
<div class="ttc" id="aclassflow_1_1log_1_1Log__context_html_af4db395042b065b00398cd59845dcb4d"><div class="ttname"><a href="classflow_1_1log_1_1Log__context.html#af4db395042b065b00398cd59845dcb4d">flow::log::Log_context::get_logger</a></div><div class="ttdeci">Logger * get_logger() const</div><div class="ttdoc">Returns the stored Logger pointer, particularly as many FLOW_LOG_*() macros expect.</div><div class="ttdef"><b>Definition:</b> <a href="log_8cpp_source.html#l00217">log.cpp:217</a></div></div>
<div class="ttc" id="aclassflow_1_1log_1_1Logger_html"><div class="ttname"><a href="classflow_1_1log_1_1Logger.html">flow::log::Logger</a></div><div class="ttdoc">Interface that the user should implement, passing the implementing Logger into logging classes (Flow'...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l01280">log.hpp:1284</a></div></div>
<div class="ttc" id="alog_8hpp_html_a325fdd4b5cf0be49b37d3b7b7c29070d"><div class="ttname"><a href="log_8hpp.html#a325fdd4b5cf0be49b37d3b7b7c29070d">FLOW_LOG_INFO</a></div><div class="ttdeci">#define FLOW_LOG_INFO(ARG_stream_fragment)</div><div class="ttdoc">Logs an INFO message into flow::log::Logger *get_logger() with flow::log::Component get_log_component...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00197">log.hpp:197</a></div></div>
<div class="ttc" id="alog_8hpp_html_a626c7dc4d3b4dc0b32a8aac8624d66bc"><div class="ttname"><a href="log_8hpp.html#a626c7dc4d3b4dc0b32a8aac8624d66bc">FLOW_LOG_WARNING</a></div><div class="ttdeci">#define FLOW_LOG_WARNING(ARG_stream_fragment)</div><div class="ttdoc">Logs a WARNING message into flow::log::Logger *get_logger() with flow::log::Component get_log_compone...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00152">log.hpp:152</a></div></div>
<div class="ttc" id="alog_8hpp_html_a6b3b2cd7ddabf90a7c6ccd104a042cc6"><div class="ttname"><a href="log_8hpp.html#a6b3b2cd7ddabf90a7c6ccd104a042cc6">FLOW_LOG_TRACE_WITHOUT_CHECKING</a></div><div class="ttdeci">#define FLOW_LOG_TRACE_WITHOUT_CHECKING(ARG_stream_fragment)</div><div class="ttdoc">Logs a TRACE message into flow::log::Logger *get_logger() with flow::log::Component get_log_component...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00354">log.hpp:354</a></div></div>
<div class="ttc" id="alog_8hpp_html_affcf2e4c496ce3f42adf981669c623b8"><div class="ttname"><a href="log_8hpp.html#affcf2e4c496ce3f42adf981669c623b8">FLOW_LOG_TRACE</a></div><div class="ttdeci">#define FLOW_LOG_TRACE(ARG_stream_fragment)</div><div class="ttdoc">Logs a TRACE message into flow::log::Logger *get_logger() with flow::log::Component get_log_component...</div><div class="ttdef"><b>Definition:</b> <a href="log_8hpp_source.html#l00227">log.hpp:227</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html"><div class="ttname"><a href="namespaceflow_1_1async.html">flow::async</a></div><div class="ttdoc">Flow module containing tools enabling multi-threaded event loops operating under the asynchronous-tas...</div><div class="ttdef"><b>Definition:</b> <a href="async__fwd_8hpp_source.html#l00074">async_fwd.hpp:75</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a024042c64b7dc544a7a5587afa4b1949"><div class="ttname"><a href="namespaceflow_1_1async.html#a024042c64b7dc544a7a5587afa4b1949">flow::async::Op</a></div><div class="ttdeci">boost::any Op</div><div class="ttdoc">An object of this opaque type represents a collection of 1 or more async::Task, past or future,...</div><div class="ttdef"><b>Definition:</b> <a href="async__fwd_8hpp_source.html#l00153">async_fwd.hpp:153</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a0a06794b16b72f2829ce3353557c8485"><div class="ttname"><a href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485">flow::async::Synchronicity</a></div><div class="ttdeci">Synchronicity</div><div class="ttdoc">Enumeration indicating the manner in which asio_exec_ctx_post(), and various boost....</div><div class="ttdef"><b>Definition:</b> <a href="async__fwd_8hpp_source.html#l00222">async_fwd.hpp:223</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a0a06794b16b72f2829ce3353557c8485a4d7a5700444c0570af37b1f9bcc6eb1f"><div class="ttname"><a href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485a4d7a5700444c0570af37b1f9bcc6eb1f">flow::async::Synchronicity::S_ASYNC</a></div><div class="ttdeci">@ S_ASYNC</div><div class="ttdoc">Simply post the given task to execute asynchronously in some execution context – as soon as the conte...</div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a0a06794b16b72f2829ce3353557c8485a57525f29ac96f4edd56c951e7d7c7b25"><div class="ttname"><a href="namespaceflow_1_1async.html#a0a06794b16b72f2829ce3353557c8485a57525f29ac96f4edd56c951e7d7c7b25">flow::async::Synchronicity::S_ASYNC_AND_AWAIT_CONCURRENT_COMPLETION</a></div><div class="ttdeci">@ S_ASYNC_AND_AWAIT_CONCURRENT_COMPLETION</div><div class="ttdoc">Same as Synchronicity::S_ASYNC but the posting routine then waits as long as necessary for the given ...</div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a2b92feccafa90bce16db57131c0fcd9e"><div class="ttname"><a href="namespaceflow_1_1async.html#a2b92feccafa90bce16db57131c0fcd9e">flow::async::Strand_ptr</a></div><div class="ttdeci">boost::shared_ptr&lt; util::Strand &gt; Strand_ptr</div><div class="ttdoc">Short-hand for ref-counted pointer to util::Strand.</div><div class="ttdef"><b>Definition:</b> <a href="async__fwd_8hpp_source.html#l00212">async_fwd.hpp:212</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a3e200db7e5375de21d2568004a85dcad"><div class="ttname"><a href="namespaceflow_1_1async.html#a3e200db7e5375de21d2568004a85dcad">flow::async::optimize_pinning_in_thread_pool</a></div><div class="ttdeci">void optimize_pinning_in_thread_pool(log::Logger *logger_ptr, const std::vector&lt; util::Thread * &gt; &amp;threads_in_pool, bool est_hw_core_sharing_helps_algo, bool est_hw_core_pinning_helps_algo, bool hw_threads_is_grouping_collated, Error_code *err_code=nullptr)</div><div class="ttdoc">Assuming the same situation as documented for optimal_worker_thread_count_per_pool(),...</div><div class="ttdef"><b>Definition:</b> <a href="concurrent__task__loop_8cpp_source.html#l00080">concurrent_task_loop.cpp:80</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a4cce43f39672e80cba5512103c53ae60"><div class="ttname"><a href="namespaceflow_1_1async.html#a4cce43f39672e80cba5512103c53ae60">flow::async::cpu_idx</a></div><div class="ttdeci">uint16_t cpu_idx()</div><div class="ttdoc">Returns the 0-based processor logical (not hardware) core index of the core executing the calling thr...</div><div class="ttdef"><b>Definition:</b> <a href="async_8cpp_source.html#l00030">async.cpp:30</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a5dad6aeb3cf4219833e18343bec0b423"><div class="ttname"><a href="namespaceflow_1_1async.html#a5dad6aeb3cf4219833e18343bec0b423">flow::async::op_to_exec_ctx&lt; Strand_ptr &gt;</a></div><div class="ttdeci">Strand_ptr op_to_exec_ctx&lt; Strand_ptr &gt;(Concurrent_task_loop *loop, const Op &amp;op)</div><div class="ttdoc">Template specialization for operation that obtains the underlying execution context,...</div><div class="ttdef"><b>Definition:</b> <a href="x__thread__task__loop_8cpp_source.html#l00420">x_thread_task_loop.cpp:420</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_a968806f54b14c697fd76b3339a2bdbbf"><div class="ttname"><a href="namespaceflow_1_1async.html#a968806f54b14c697fd76b3339a2bdbbf">flow::async::Task_engine_ptr</a></div><div class="ttdeci">boost::shared_ptr&lt; util::Task_engine &gt; Task_engine_ptr</div><div class="ttdoc">Short-hand for reference-counting pointer to a mutable util::Task_engine (a/k/a boost::asio::io_conte...</div><div class="ttdef"><b>Definition:</b> <a href="async__fwd_8hpp_source.html#l00198">async_fwd.hpp:198</a></div></div>
<div class="ttc" id="anamespaceflow_1_1async_html_adab04f47b40b92fffbe12bc33fadd223"><div class="ttname"><a href="namespaceflow_1_1async.html#adab04f47b40b92fffbe12bc33fadd223">flow::async::optimal_worker_thread_count_per_pool</a></div><div class="ttdeci">unsigned int optimal_worker_thread_count_per_pool(log::Logger *logger_ptr, bool est_hw_core_sharing_helps_algo)</div><div class="ttdoc">Assuming a planned thread pool will be receiving ~symmetrical load, and its UX-affecting (in particul...</div><div class="ttdef"><b>Definition:</b> <a href="concurrent__task__loop_8cpp_source.html#l00037">concurrent_task_loop.cpp:37</a></div></div>
<div class="ttc" id="anamespaceflow_1_1log_html_a5c602384e6fe9d7642740ac2fae4ad04a3ee808b04c34bf6c110e3754de277f7b"><div class="ttname"><a href="namespaceflow_1_1log.html#a5c602384e6fe9d7642740ac2fae4ad04a3ee808b04c34bf6c110e3754de277f7b">flow::log::Sev::S_TRACE</a></div><div class="ttdeci">@ S_TRACE</div><div class="ttdoc">Message indicates any condition that may occur with great frequency (thus verbose if logged).</div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_a685b86585da2fa5186f51854e7ae1561"><div class="ttname"><a href="namespaceflow_1_1util.html#a685b86585da2fa5186f51854e7ae1561">flow::util::ostream_op_string</a></div><div class="ttdeci">std::string ostream_op_string(T const &amp;... ostream_args)</div><div class="ttdoc">Equivalent to ostream_op_to_string() but returns a new string by value instead of writing to the call...</div><div class="ttdef"><b>Definition:</b> <a href="util_2util_8hpp_source.html#l00381">util.hpp:381</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_a74d4a66fb00055be4e1bd6ee98e04667"><div class="ttname"><a href="namespaceflow_1_1util.html#a74d4a66fb00055be4e1bd6ee98e04667">flow::util::schedule_task_from_now</a></div><div class="ttdeci">Scheduled_task_handle schedule_task_from_now(log::Logger *logger_ptr, const Fine_duration &amp;from_now, bool single_threaded, Task_engine *task_engine, Scheduled_task_handler &amp;&amp;task_body_moved)</div><div class="ttdoc">Schedule the given function to execute in a certain amount of time: A handy wrapper around Timer (asi...</div><div class="ttdef"><b>Definition:</b> <a href="sched__task_8hpp_source.html#l00034">sched_task.hpp:34</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_aa0d10f5a906b3229f48979aa43e9ff7e"><div class="ttname"><a href="namespaceflow_1_1util.html#aa0d10f5a906b3229f48979aa43e9ff7e">flow::util::Scheduled_task_handle</a></div><div class="ttdeci">boost::shared_ptr&lt; Scheduled_task_handle_state &gt; Scheduled_task_handle</div><div class="ttdoc">Black-box type that represents a handle to a scheduled task as scheduled by schedule_task_at() or sch...</div><div class="ttdef"><b>Definition:</b> <a href="sched__task__fwd_8hpp_source.html#l00045">sched_task_fwd.hpp:45</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_aa59354ab408e978c8a7bda1a4706924e"><div class="ttname"><a href="namespaceflow_1_1util.html#aa59354ab408e978c8a7bda1a4706924e">flow::util::Strand</a></div><div class="ttdeci">Task_engine::strand Strand</div><div class="ttdoc">Short-hand for boost.asio strand, an ancillary class that works with Task_engine for advanced task sc...</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00138">util_fwd.hpp:138</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_ac3e89a8a271b0ddc76ac2a0ce488dea4"><div class="ttname"><a href="namespaceflow_1_1util.html#ac3e89a8a271b0ddc76ac2a0ce488dea4">flow::util::Task_engine</a></div><div class="ttdeci">boost::asio::io_context Task_engine</div><div class="ttdoc">Short-hand for boost.asio event service, the central class of boost.asio.</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00135">util_fwd.hpp:135</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_ae4dc52186797094b3040379ff19124c9"><div class="ttname"><a href="namespaceflow_1_1util.html#ae4dc52186797094b3040379ff19124c9">flow::util::String_view</a></div><div class="ttdeci">Basic_string_view&lt; char &gt; String_view</div><div class="ttdoc">Commonly used char-based Basic_string_view. See its doc header.</div><div class="ttdef"><b>Definition:</b> <a href="string__view_8hpp_source.html#l00191">string_view.hpp:191</a></div></div>
<div class="ttc" id="anamespaceflow_1_1util_html_af030c3119f060a9630afca31098a78a5"><div class="ttname"><a href="namespaceflow_1_1util.html#af030c3119f060a9630afca31098a78a5">flow::util::Thread</a></div><div class="ttdeci">boost::thread Thread</div><div class="ttdoc">Short-hand for standard thread class.</div><div class="ttdef"><b>Definition:</b> <a href="util__fwd_8hpp_source.html#l00078">util_fwd.hpp:78</a></div></div>
<div class="ttc" id="anamespaceflow_html_a3938730ab4b89daf13d027a5f620e7ce"><div class="ttname"><a href="namespaceflow.html#a3938730ab4b89daf13d027a5f620e7ce">flow::Flow_log_component</a></div><div class="ttdeci">Flow_log_component</div><div class="ttdoc">The flow::log::Component payload enumeration comprising various log components used by Flow's own int...</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00637">common.hpp:638</a></div></div>
<div class="ttc" id="anamespaceflow_html_a48799f1263cdeedec125be51a3db2b79"><div class="ttname"><a href="namespaceflow.html#a48799f1263cdeedec125be51a3db2b79">flow::Fine_duration</a></div><div class="ttdeci">Fine_clock::duration Fine_duration</div><div class="ttdoc">A high-res time duration as computed from two Fine_time_pts.</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00416">common.hpp:416</a></div></div>
<div class="ttc" id="anamespaceflow_html_a9d9cc2eeb10d398cff5591d446b763b8"><div class="ttname"><a href="namespaceflow.html#a9d9cc2eeb10d398cff5591d446b763b8">flow::Fine_time_pt</a></div><div class="ttdeci">Fine_clock::time_point Fine_time_pt</div><div class="ttdoc">A high-res time point as returned by Fine_clock::now() and suitable for precise time math in general.</div><div class="ttdef"><b>Definition:</b> <a href="common_8hpp_source.html#l00413">common.hpp:413</a></div></div>
<div class="ttc" id="asched__task_8hpp_html"><div class="ttname"><a href="sched__task_8hpp.html">sched_task.hpp</a></div></div>
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